58

Questions
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2
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486
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Limitations on model-categorical presentations

may 7 12 at 22:52 Mike Shulman 17.2k●20●70

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1
answer
474
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Internal categories in simplicial sets

dec 25 at 7:59 Jeremy Hahn 436●2●8

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7
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How many proofs that $\pi_n(S^n)=\mathbb{Z}$ are there?

feb 15 at 21:36 Chris Gerig 5,526●1●12●40

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2k
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What does an etale topos classify?

dec 9 10 at 4:50 Harry Gindi 8,878●2●33●96

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14
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3
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869
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Loop space of a category

dec 6 at 7:16 Fedotov 363●1●6

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12
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2
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869
views

Topological vs pro fundamental groups

feb 9 11 at 16:56 Jeremy Brazas 1,516●1●5●12

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571
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When is a reflective subcategory of a topos a topos?

dec 13 11 at 1:23 David Carchedi 7,747●10●27

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0
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275
views

Recognizing classifying toposes

dec 21 11 at 19:07 Mike Shulman 17.2k●20●70

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1
answer
307
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Do strict pro-sets embed in locales?

feb 3 11 at 6:26 Dmitri Pavlov 7,088●1●13●44

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437
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Can Vopenka’s principle be violated definably?

nov 18 10 at 20:57 Joel David Hamkins 75.5k●8●188●346

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